* {
    padding: 0;
    margin: 0;
}
body, html {
    height: 100%;
    margin: 0;
    overflow-x: hidden;
}

button {
    text-decoration: none;
}

.btn {

    text-shadow: 0.5px 0.5px 8px white;

}

.btn {
    font-size: 20px;
}

.imge {
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgb(0, 0, 0)),
        url("../images/bg22.jpg");
    filter: brightness(1.2);
    background-repeat: no-repeat;
    background-size: cover;
    z-index: 5;
    height: 60vh;
    padding: 10px;
    border-radius: 0 0 70px 70px;
}


.header h1 {

    font-size: 58px;
    color: white;
    text-shadow: 0.5px 0.5px 8px white;
    padding-top: 80px;
}



.header .card {
    width: 90%;
    text-shadow: 0.5px 0.5px 8px white;
    box-shadow: 0.5px 0.5px 10px darkblue;
}

.header .card-footer .btn {
    border-radius: 20px;
}

.gravity_section .astronaut img {
    animation: floating 4s infinite ease-in-out;
    margin-bottom: 50px;
}

@keyframes floating {

    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(80px);
    }

    100% {
        transform: translateY(0px);
    }
}




.footer a {

    width: 50px;
    padding-top: 50px;
    
}

@media screen and (max-width:1200px) {

    .gravity_section h1,
    .cards-container h1 {
        text-align: center;
    }

}


@media screen and (max-width:650px) {

    nav {
        z-index: 5;
    }

    .logo_lg img {
        width: 250px !important;
        margin-top: 100px;
        margin-bottom: 50px;
    }
}